Hydraulic Connections - Beretta METEO GREEN HE R.S.I. Installer And User Manual

The "anti-blocking" function is only active when the electrical power
supply to the boiler is on.
Operating the circulation system without any water is strictly forbidden.
VARIABLE SPEED CIRCULATION UNIT
The modulating circulating function is only active for the heating function.
When switching the three ways on the plate heat exchanger, the circulation
unit is set at maximum speed. The modulating circulation function applies
only to the boiler circulation unit and not to circulation units on any external
devices connected to it (e.g. booster circulation unit).
Any of 4 operating modes can be chosen, depending on situations and the
type of plant.
By accessing parameter 90 in the technical menu, one of the following pos-
sibilities can be chosen:
1 - VARIABLE SPEED CIRCULATION UNIT WITH PROPORTIONAL
02'(  ” 3  ” 
  9$5,$%/( 63((' &,5&8/$7,21 81,7 :,7+ &2167$17 ¨7 02'(
 ” 3  ” 
3 - VARIABLE SPEED CIRCULATION UNIT WITH MAXIMUM FIXED
MAXIMUM SPEED MODE (P90 = 1)
4 - EXCEPTIONAL USE OF A STANDARD CIRCULATION UNIT WITHOUT
SPEED ADJUSTMENT (P90 = 0)
1 - VARIABLE SPEED CIRCULATION UNIT WITH PROPORTIONAL
02'(  ” 3  ” 
In this mode the boiler's board determines what flow rate curve to adopt
according to the instantaneous power supplied by the boiler.
The boiler controller breaks down the power range within which the boiler
operates in heating mode into various levels. Depending on the power level
in use when heating, one of the speeds available is selected automatically
according to a linear logic:
- maximum power = high speed
- minimum power = low speed
This is used on all types of plants where the machine's power has been
correctly balanced with the plant's real needs.
Operationally:
- Access parameter 90
- Set the parameter = 41
NOTE - The parameter 90 = 41 setting is recommended by the manufacturer.
Values exceeding 41 are used in specific cases.
6,0
5,8
5,6
5,4
5,2
5,0
4,8
4,6
4,4
4,2
4,0
3,8
3,6
3,4
3,2
MODULATION
3,0
2,8
2,6
2,4
2,2
2,0
1,8
1,6
1,4
1,2
1,0
0,8
0,6
0,4
0,2
0,0
0 100 200 300 400
Plant flow rate (l/h)
2 - VARIABLE SPEED CIRCULATION UNIT WITH CONSTANT DT
02'(  ” 3  ” 
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delivery and return (e.g. if a value of 10 is entered, the circulation unit's
speed will change to implement a plant flow rate aimed at maintaining the
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By periodically sampling the values provided by the boiler delivery/return
sensors, the board increases or decreases the circulation unit's speed
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Vice-versa is sampling is higher than the value set, the speed is increased.
This is used for direct high temperature plants (typical of replacement),
where the boiler is not thermostatically controlled, and where a calculated
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PUMP
AREA
500 600 700 800 900 1000 1100
When working with a constant delivery temperature and attainment of sta-
bilising the ambient conditions, the average temperature of the radiators
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obtained by changing the operating curve, which produces a lower return
temperature that in turn favours high boiler performance and the reduction
of electricity consumption.
Operationally:
- Access parameter 90
- Set the parameter at a value between 2 and 40 (normally between 10
and 20).
3 - VARIABLE SPEED CIRCULATION UNIT WITH MAXIMUM FIXED
MAXIMUM SPEED MODE (P90 = 1)
In this mode the modulating circulation unit works constantly at maximum
speed.
It is used on plants with a high load loss in which the boiler's head must be
used as much as possible in order to guarantee sufficient circulation (plant
flow rate at maximum speed lower than 600 litres per hour).
This is used when bottles of mixture are involved, with high flow rates in the
circuit downstream.
Operationally:
- Access parameter 90
- Set the parameter = 1
4 - EXCEPTIONAL USE OF A STANDARD CIRCULATION UNIT
WITHOUT SPEED ADJUSTMENT (P90 = 0)
This mode must be used in exceptional cases in which the boiler is to be used
with a traditional circulation unit without a speed adjustment. It presupposes
that the adjustable speed circulation unit has been removed and replaced
with a non-adjustable speed circulation unit.
WARNING!!! The BE06 board connected to connector CN9 must be removed
and replaced with a connector with a jumper to be inserted into connector
CN9. This latter connection is obligatory and if not formed may cause the
system to malfunction.
Operationally:
- Access parameter 90
- Set the parameter = 0
CONFIGURATIONS RECOMMENDED BY THE
MANUFACTURER
HIGH TEMPERATURE
(radiators without
thermostatic valves)
LOW TEMPERATURE
(floor)
HIGH TEMPERATURE
(radiators with thermostatic
valves)
1200

10 - HYDRAULIC CONNECTIONS

Position and dimensions of hydraulic connections are specified in figure 1.1:
R CH return
M CH flow
G Gas connection
F Support plate
C Pre-installation template
METEO GREEN HE R.S.I.
EXTERNAL
EXTERNAL
SENSOR NO
SENSOR YES
(no heat
(heat regulation)
regulation)
PROPORTIONAL ¨7 FRQVWDQW
(P90 = 41) ”3 ”
PROPORTIONAL PROPORTIONAL
(P90 = 41) (P90 = 41)
PROPORTIONAL PROPORTIONAL
(P90 = 41) (P90 = 41)
3/4"
3/4"
3/4"
11